import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
Vue.use(VueRouter)

const routes = [{
  path: '/',
  redirect: '/login'
},
{
  path: '/login',
  component: Login
},
{
  path: '/home',
  component: Home,
  redirect: '/welcome',
  children: [
    { path: '/welcome', component: Welcome },
    { path: '/users', component: Users },
    { path: '/rights', component: Rights },
    { path: '/roles', component: Roles }
  ]
}
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // next是一个函数，表示放行
  if (to.path === '/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login') // 如果没有token，跳转登录界面
  next()
})

export default router
